SEAGATE TECHNOLOGY HLDNGS PL (STX) Institutional Shareholders
SEAGATE TECHNOLOGY HLDNGS PL (STX) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $75.06B in STX holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of STX tracked by InsiderSet, reporting ownership valued at approximately $5.59B in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $11.86B, representing an estimated gain of +112.13% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 48% of the total disclosed STX value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Vanguard Capital Management Llc, Sanders Capital, Llc, and several other long-term asset managers with concentrated positions in SEAGATE TECHNOLOGY HLDNGS PL (STX).
This page ranks the largest institutional STX shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
1,683
Total Reported Value
$75.06B
Largest Holder
Blackrock, Inc.
Largest Position
$5.59B
Insider Transactions (90d)
50
Latest Filing Quarter
Q2 2026
New Institutional Positions
197
Funds Exiting Positions
1
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.10% | 14,274,083 | $5,592,014,773 | $11,862,619,418 | +$6,270,604,645 | +112.13% | |
| Vanguard Capital Management Llc | 0.14% | 14,155,673 | $5,545,626,455 | $11,764,213,603 | +$6,218,587,148 | +112.13% | |
| Sanders Capital, Llc | 6.02% | 12,897,201 | $5,052,607,464 | $10,718,347,863 | +$5,665,740,399 | +112.13% | |
| Vanguard Portfolio Management Llc | 0.23% | 11,094,908 | $4,346,541,158 | $9,220,534,242 | +$4,873,993,084 | +112.13% | |
| State Street Corp | 0.13% | 9,321,632 | $3,658,717,865 | $7,746,835,490 | +$4,088,117,625 | +111.74% | |
| Fmr Llc | 0.17% | 8,176,918 | $3,203,389,081 | $6,795,509,473 | +$3,592,120,392 | +112.14% | |
| Massachusetts Financial Services Co | 0.80% | 2,560,276 | $2,507,401,741 | $2,127,742,973 | -$379,658,768 | -15.14% | |
| Capital Research Global Investors | 0.35% | 5,736,070 | $2,247,162,783 | $4,767,018,334 | +$2,519,855,551 | +112.13% | |
| Geode Capital Management, Llc | 0.12% | 5,060,828 | $1,979,053,372 | $4,205,851,718 | +$2,226,798,346 | +112.52% | |
| Morgan Stanley | 0.11% | 4,759,312 | $1,864,509,052 | $3,955,273,831 | +$2,090,764,779 | +112.13% | |
| Wcm Investment Management, Llc | 3.60% | 4,346,852 | $1,575,429,570 | $3,612,494,823 | +$2,037,065,253 | +129.30% | |
| Dz Bank Ag Deutsche Zentral Genossenschafts Bank, Frankfurt Am Main | 1.29% | 3,620,072 | $1,418,199,406 | $3,008,497,036 | +$1,590,297,630 | +112.13% | |
| Goldman Sachs Group Inc | 0.18% | 3,573,790 | $1,400,068,128 | $2,970,033,917 | +$1,569,965,789 | +112.13% | |
| Franklin Resources Inc | 0.34% | 3,518,195 | $1,378,288,148 | $2,923,831,137 | +$1,545,542,989 | +112.13% | |
| Bank Of America Corp | 0.10% | 3,380,440 | $1,324,321,093 | $2,809,348,466 | +$1,485,027,373 | +112.13% | |
| Exchange Traded Concepts, Llc | 5.50% | 1,152,676 | $1,112,332,340 | $957,942,917 | -$154,389,423 | -13.88% | |
| Invesco Ltd. | 0.16% | 2,599,850 | $1,018,517,202 | $2,160,631,341 | +$1,142,114,139 | +112.13% | |
| Swedbank Ab | 0.68% | 822,103 | $793,329,395 | $683,216,919 | -$110,112,476 | -13.88% | |
| Northern Trust Corp | 0.10% | 1,896,993 | $743,165,977 | $1,576,515,003 | +$833,349,026 | +112.13% | |
| Nomura Asset Management International Inc. | 1.21% | 1,804,383 | $706,885,000 | $1,499,550,536 | +$792,665,536 | +112.14% | |
| Deutsche Bank Ag\ | 0.23% | 1,759,174 | $689,174,007 | $1,461,979,144 | +$772,805,137 | +112.13% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.12% | 1,534,212 | $601,042,893 | $1,275,022,225 | +$673,979,332 | +112.13% | |
| Legal & General Group Plc | 0.14% | 1,514,617 | $593,366,357 | $1,258,737,604 | +$665,371,247 | +112.13% | |
| Arrowstreet Capital, Limited Partnership | 0.30% | 1,433,495 | $561,586,001 | $1,191,320,355 | +$629,734,354 | +112.13% | |
| Sumitomo Mitsui Trust Group, Inc. | 0.31% | 556,378 | $536,904,770 | $462,383,501 | -$74,521,269 | -13.88% | |
| Charles Schwab Investment Management Inc | 0.08% | 1,364,839 | $534,689,327 | $1,134,263,099 | +$599,573,772 | +112.13% | |
| D. E. Shaw & Co., Inc. | 0.40% | 1,289,573 | $505,203,118 | $1,071,712,537 | +$566,509,419 | +112.13% | |
| Vanguard Fiduciary Trust Co | 0.12% | 1,201,062 | $470,528,049 | $998,154,586 | +$527,626,537 | +112.13% | |
| Citigroup Inc | 0.21% | 457,832 | $441,807,891 | $380,485,862 | -$61,322,029 | -13.88% | |
| Holocene Advisors, Lp | 1.03% | 1,087,617 | $426,084,836 | $903,874,984 | +$477,790,148 | +112.13% | |
| Bank Of New York Mellon Corp | 0.08% | 1,058,303 | $414,600,910 | $879,513,291 | +$464,912,381 | +112.13% | |
| Royal Bank Of Canada | 0.08% | 1,013,493 | $397,045,000 | $842,273,493 | +$445,228,493 | +112.14% | |
| Bank Of Montreal | 0.16% | 1,008,491 | $395,086,433 | $838,116,530 | +$443,030,097 | +112.13% | |
| Envestnet Asset Management Inc | 0.09% | 398,344 | $384,402,108 | $331,047,765 | -$53,354,343 | -13.88% | |
| Aqr Capital Management Llc | 0.18% | 1,001,039 | $383,988,813 | $831,923,471 | +$447,934,658 | +116.65% | |
| Janus Henderson Group Plc | 0.19% | 967,528 | $378,985,003 | $804,073,820 | +$425,088,817 | +112.17% | |
| Amundi | 0.10% | 965,565 | $378,266,579 | $802,442,449 | +$424,175,870 | +112.14% | |
| Russell Investments Group, Ltd. | 0.40% | 966,461 | $376,622,058 | $803,187,079 | +$426,565,021 | +113.26% | |
| Polar Capital Holdings Plc | 1.60% | 933,859 | $365,848,602 | $776,092,861 | +$410,244,259 | +112.13% | |
| Value Aligned Research Advisors, Llc | 4.24% | 914,657 | $358,326,026 | $760,134,846 | +$401,808,820 | +112.13% | |
| Canada Pension Plan Investment Board | 0.22% | 883,574 | $346,148,950 | $734,303,008 | +$388,154,058 | +112.13% | |
| Dimensional Fund Advisors Lp | 0.07% | 836,018 | $327,195,512 | $694,781,119 | +$367,585,607 | +112.34% | |
| National Pension Service | 0.25% | 827,761 | $324,283,649 | $687,919,057 | +$363,635,408 | +112.13% | |
| Nuveen, Llc | 0.08% | 771,379 | $302,195,266 | $641,062,232 | +$338,866,966 | +112.14% | |
| Atalan Capital Partners, Lp | 25.95% | 718,800 | $281,597,088 | $597,365,928 | +$315,768,840 | +112.13% | |
| Amanah Holdings Trust | 16.42% | 289,774 | $279,631,910 | $240,819,580 | -$38,812,330 | -13.88% | |
| Barclays Plc | 0.09% | 669,828 | $262,411,817 | $556,667,258 | +$294,255,441 | +112.13% | |
| Swiss National Bank | 0.14% | 639,400 | $250,491,344 | $531,379,764 | +$280,888,420 | +112.13% | |
| Ubs Group Ag | 0.04% | 632,683 | $247,859,970 | $525,797,534 | +$277,937,564 | +112.13% | |
| Storebrand Asset Management As | 0.08% | 3,063,106 | $244,607,490 | $2,545,624,872 | +$2,301,017,382 | +940.70% |
Frequently asked questions about STX
Who owns the most STX stock?
The largest holders of STX are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for SEAGATE TECHNOLOGY HLDNGS PL (STX).
Is STX widely held by superinvestors?
Many widely followed stocks like STX appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly STX is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.